InChI=1S/C19H22N2O9/c1-9-6-10(23)7-11(28-3)14(9)18(26)30-16-12(8-22)29-17(15(16)25)21-5-4-13(24)20(2)19(21)27/h4-7,12,15-17,22-23,25H,8H2,1-3H3/t12-,15-,16-,17-/m1/s1